Improvement in grate-bearing bars



J. BAMRIGK. Grate-Bearing Bar.

No. 210,396. Patented Dec. 3,1878.

Fi I. m. 2.

VIN TOR N. PEnzRsv PHOTOL1THOGRAFHER, WASHINGTON. 0 C4 UNITED STATES PATENT OEEIoE.

JAMES BAMRIOK, OF SYRACUSE, NEW YORK.

IMPROVEMENT IN GRATE-BEARING BARS.

Specification forming part of Letters Patent No. 2 [0,396, dated December 3, 1878; application filed J une 26, 1878.

To all whom it may concern:

Be it known that 1, JAMES BAMRICK, of Syracuse, Onondaga county, New York, have invented a new and Improved Grate-Bearing Bar, which improvement is fully set forth in the following specification and accompanying drawings, in which Figure 1 represents a side view; Fig. 2, a section on the line no a', and Fig. 3 a top view.

The object of my invention is to provide an improved device for supporting grate-bars in furnaces or fireboxes; and it consists in reducin g the bearingsurface of the grate-bar to a minimum in width, and again subdividing this bearing-surface crosswise by grooves, so that the grate-bars will bear upon the apexes' of a series of pyramids and be supported upon them, while the grooves between these pyramids will allow a circulation of air under and tending to cool the grate-bars as they lie upon these apex bearings, thus preventing their burning out as rapidly as where bearing-bars with a flat or plane upper or bearing surface are used.

In the drawings, A is the bar, which is made with square or rectangular ends A A, upon which the bar lies in use. The two opposite sides 0 O are beveled off toward each other down to an edge upon the upper face of the bar, and between the ends A A, as shown in the drawings. This edge is subdivided crosswise by a series of V-shaped grooves or channels, which form a series of four-sided pyramids, t t.

The spaces between these pyramid-teeth t t are made of such width that a grate-bar will rest upon two or more of them. Also, a ridge, l, is made between these pyramid-teeth, running lengthwise of the grate-bar, so that the ashes will not catch and gather in the grooves, and the bar will always clean itself.

In each of the three figures, B represents a grate-bar, and shows how it lies upon the pyramid-points.

By this construction of a gratebearing bar the grate-bars themselves lie upon two or more points or apexes of pyramids in each bearingbar, and the grooves between the pyramidteeth allow a circulation of air, and thus the grate-bars are kept cool and prevented from burning out at the point of bearing upon the grate-bar, which is the usual place for them to burn out.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a grate-bearin g bar, the pyiamidal points or teeth t t, forming the bearing-surface of the bar B by beveling off the sides of the bar A, and by the transverse V- shaped grooves, substantially as and for the purposes above set forth.

2. In a grate-bearing bar, the longitudinal ridge Z, between the bases of the pyramidal points t t, constructed and operating substantially as and for the purposes above set forth.

3. The above-described grate-bearing bar, constructed with the square ends A, beveled sides (J O, and transverse V-shaped grooves forming the pyramids t t, and the ridge 1, extending longitudinally between the bases of the pyramids, substantially as and tor the purposes above specified.

JAMES BAMRIOK.

Witnesses:

O. W. SMITH, HAMILTON BAXTER. 

